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Ink, ink set, ink jet recording method, ink cartridge and ink jet recording apparatus

a technology of ink jet and recording method, which is applied in the field of ink jet recording apparatus, ink jet recording method, etc., can solve the problems of pigment yellow 74 being particularly thermally unstable among numerous pigments, rapid and excessive dispersion breakdown, etc., to improve the stability of ink ejection

Inactive Publication Date: 2006-09-07
CANON KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0026] Thus, according to the present invention, there is provided an ink to be used in an ink jet recording method in which ink is ejected from a recording head through action of thermal energy that can improve the ink ejection stability.

Problems solved by technology

However, C. I. Pigment Yellow 74 is particularly thermally unstable among numerous pigments.
As a result, it was found that the dispersion breakdown of the pigment dispersion that is caused by the heat applied to it when ink droplets are ejected occurs rapidly and excessively particularly in the case of monoazo pigment dispersions that show a low thermal stability among numerous pigment dispersions.
When heat is applied to an ink containing thermally unstable monoazo pigments as coloring material to raise the ink temperature, dispersion breakdown of the pigment dispersion takes place rapidly and excessively.
Then, as a result, deposits adhere to the inside of the ink flow path and vicinity of the ejection orifices to consequently block the ink flow path of the recording head and degrade the ejection stability.

Method used

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  • Ink, ink set, ink jet recording method, ink cartridge and ink jet recording apparatus
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  • Ink, ink set, ink jet recording method, ink cartridge and ink jet recording apparatus

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[0106] Now, the present invention will be described further by way of examples and comparative examples. Note, however, that the present invention is by no means limited by the examples that are described below without departing from the scope of the present invention. In the following description, “parts” and “%” refer respectively to parts by mass and % by mass unless noted otherwise.

[0107] Differential scanning calorimetry (DSC) is a technique of differential calorimetric analysis. For the purpose of the present invention, a DSC Q1000 (trade name, available from TA Instruments Co.) was used for DSC observations. The observations were conducted with a heating rate of 10 K / min within a temperature range of 25° and 220° C.

[0108] The weight average particle diameters were observed by means of a laser zeta potentiometer ELS8000 (trade name, available from OTSUKA ELECTRONICS).

[0109] (Synthesis of C. I. Pigment Yellow 74)

[0110] 187.8 parts of 2-methoxy-4-nitro-aniline was added to a...

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Abstract

An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy can improve the ink ejection stability. An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy is characterized in that the ink comprises a pigment represented by the general formula (1), a dispersant and a water-soluble organic compound, and the pigment substantially shows neither an exothermic peak nor an endothermic peak in the range 25° C. or more to 200° C. or less of a DSC curve obtained by means of a differential scanning calorimeter (DSC).

Description

[0001] This application is a continuation of International Application No. PCT / JP2006 / 300920, filed on Jan. 17, 2006, which claims the benefit of Japanese Patent Application No. 2005-010305 filed on Jan. 18, 2005.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates to an ink to be used in an ink jet recording method in which ink is ejected from a recording head through action of thermal energy, an ink cartridge, an ink jet recording method and an ink jet recording apparatus using such an ink. More particularly, the present invention relates to an ink containing a coloring material having a specific structure that can improve the ink ejection stability and shows a high storage stability as well as an ink cartridge, an ink jet recording method and an ink jet recording apparatus for using such an ink. [0004] 2. Related Background Art [0005] Ink jet recording is a recording method in which ink is applied to a recording medium such as a sheet of pape...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09D11/00B41J2/01B41M5/00C09D11/322C09D11/326C09D11/38
CPCC09B29/33C09D11/322C09D11/40
Inventor TSUJI, ITARUNAKAJIMA, YOSHIOHAKAMADA, SHINICHITAKADA, YOICHI
Owner CANON KK
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